Enhanced Hanbury Brown and Twiss interferometry using parametric amplification

The Hanbury Brown and Twiss (HBT) interferometer was proposed to observe intensity correlations of starlight to measure a star’s angular diameter. As the intensity of light that reaches the detector from a star is very weak, one cannot usually get a workable signal-to-noise ratio. We propose an impr...

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Bibliographic Details
Published inEPJ quantum technology Vol. 7; no. 1
Main Authors Ma, Xiaoping, You, Chenglong, Adhikari, Sushovit, Gu, Yongjian, Magaña-Loaiza, Omar S., Dowling, Jonathan P., Lee, Hwang
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.12.2020
Springer Nature B.V
Subjects
Correlation analysis
Diameters
Interferometry
Luminous intensity
Nanotechnology and Microengineering
Parametric amplifiers
Physics
Physics and Astronomy
Quantum Information Technology
Quantum Physics
Remote sensing
Signal to noise ratio
Spintronics
OPA
SNR
HBT
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Summary:The Hanbury Brown and Twiss (HBT) interferometer was proposed to observe intensity correlations of starlight to measure a star’s angular diameter. As the intensity of light that reaches the detector from a star is very weak, one cannot usually get a workable signal-to-noise ratio. We propose an improved HBT interferometric scheme incorporating optical parametric amplifiers (OPA) into the system to amplify the correlation signal. Remarkably, for weak star light, the signal-to-noise ratio (SNR) in the new HBT interferometric scheme is much better than that of conventional HBT interferometer. Our work is valuable in measuring a star whose intensity at the detector is low and maybe also applicable in remote sensing and long-distance quantum imaging where the light passed through the object is weak after a long distance transmission.
ISSN:2662-4400
2196-0763
DOI:10.1140/epjqt/s40507-020-00085-5